My father and my mother have been married for 30 years, and never once with each other.A.

My father and my mother have been married for 30 years, and never once with each other.
A. they have quarrelled
B. did they quarrel
C. had they quarrelled
D. have they quarrelled

A. they have quarrelledB. did they quarrelC. had they quarrelled(答案→)D. have they quarrelled解析：句意：我爸爸和妈妈结婚已经30年了，他们从没有吵过架。因为是从结婚到现在一直没有吵过架，用现在完成时，还有never这样的否定词放在句首的时候，谓语用部分倒装，助动词have放在主语前面，所以选D。

就是这个解释